Improvement in dovetailing-machines



J'. E HASKELL.

DOVETAILING-MACHINE. No. 174,674. Patented 'March 14, 1876.

Witnesses. Inventor.

N-PETERS, PHOTO-UTHOGRAPMER, WASHINGTON, D C.

,W if

1m STATES PATENT QFFIGE.

JOSEPH E. HASKEDL, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN. DOVETAILING-MACHINES.

Specificationforming part of Letters Patent No. 174,674, dated March 14,1876; application filed September 9, 1875.

To all whom itmzay concern Be it known that I, JosEPH E. HASKELL, ofBaltimore, in the county of Baltimore and State of Maryland, haveinvented certain Improvements in Dovetailing-Machines, of which thefollowing is a specification:

The nature of this invention consists in constructing a cheap andeffective dovetailmachine, in which the pieces or sides to be dovetailedtogether are held together at one corner rigidly in stationary clamps,while the rotarycutters are moved along the required path by mechanismconstructed to give them such positive motion as shall so cut thedovetails that each part left on one piece shall fit into thecorresponding recess cut into the other piece or side of the box ordrawer.

Figure l is a side elevation of a machine embodying my invention. Fig. 2is a top view of the same. Fig. 3 is a side elevation of parts of themachine, showing their-regular track T, one side or bed=piece of' themain frame, and the parts by which the vertical motions of the cutter Fare obtained as it moves along the horizontal track A.

A A is the main frame oftie machine. Bis a slide-table, which moveshorizontally on the main frame A A. (J O" are vertical posts on theslide-frame B, on which the frame D moves vertically. E E are the twosides of a drawer or box which are to be dovetailed together, and theyare held rigidly in place, the end of one resting on the end of theother, and both stationary with the main frame by means of the clamps cc. F is a shaft revolving in boxes secured to the frame D, and carryingat one end the cutter F, and driven at the other end by means of thepulley F. L and P are loose pulleys, and P is the driving-pulley, andover the pulleys P, P,

F, and L the endless belt 9 0 passes. The table or frame B moves alongthe tracks A A by means of the screw S and nut N. The screw S is, inturn, driven by the gears g g, the gear 9 being placed on the shaftwhich is driven by the pulley P, to which the beltpower for operatingthe machine is applied. T is a stationary and recessed track, (see Fig.3,) secured to the inaiiiframe A. Along the track the roller 1" passes.The roller 1' is secured to the rod or connection J, which is, in

turn, pivoted and secured to the arm 8, extending from the slide-tableB. As the roller 1' rises and 'falls along the track T, the frame D iscorrespondingly raised or depressed by means of the connecting-rod orstandard I, which extends from the frame D and rests upon the arm J, towhich the roller 1" is attaohed.

Operation: In operating this machine a drivin g-belt is applied to thepulley P, giving motion to both the gear 9 and pulley P on the sameshaft. The gear g meshes into and drives the gear g, which is secured toand drives the screw S. As the screw Srevolves,

the nut N and table B, to which it is secured, move along in eitherdirection, according to direction in which the screw revolves. It isintended either to reverse the motion of the screw when thenut reacheseither end,or else to have a nut which can be loosened or removed fromthe screw, to allow the nut and table B to pass back again after it hastraversed the length of the slides. of the box or drawer to bedovetailed together are placed, the one, E, horizontally on the machineand beneath the clamp 0, the other, E

belt is always of very nearly the same tension,

and will always drive the cutter F when the machine is in motion. Thus,from thebelt O a very rapid motion can always be imparted to the cutterF. As the table B and cutter F are carried along the ways A A, theroller 1" passes along the track T '1, giving the necessary verticalmotions to the slide D and the cutter F. As the roller 1" passes intothe depressions in the track T, the cutter passes down and cuts out therecesses e e in the end of the side E, (see Fig. 3,) and as the roller4" passes over .the elevations of the track '1, the cutter F cuts aroundand leaves the dovetails e e on the end of the piece or side E. Thesedovetail pieces e e, and also the'recesses The two sides e e, are cutbeveling', according to the shape or bevel of the cutter F. (See Fig.2.) After the cutter has passed along the edge of the pieces, if thepiece E is removed and, turned over, the dovetail pieces 0 a will fitinto and fill the corresponding recesses e e in the piece E, and a firmand substantial dovetail will be formed, suitable for one corner of anybox or drawer.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination of the ways AA, horizontally moving table B,vertically-moving slide D, and revolving cutter F, for forming thedovetail parts 0 e e e, substantially as described. 1

JOSEPH E. HASKELL. Witnesses: v

JAMES GLASGOW, RICHARD W. ULEMENTS.

